vsutil.dll error BEFORE install

Hi Guys,

I bought ZASS a while ago and have just reformatted my laptop. I re-downloaded the latest release for vista SP2. When I try to install this, Zone Alarm first checks for the necessary prerequisites...it is at this point that it tells me...

"Could not load the DLL library
C:\Users\...\vsutil.dll.
The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log for more detail"